Patents by Inventor Nadir Recham
Nadir Recham has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9590245Abstract: The present arrangement provides compounds (I) AaMm(YO4)yZz(I) that are obtained from precursors of the constituent elements by a method having steps that can include dispersion of the precursors in a liquid support having one or more ionic liquids made up of a cation and an anion the electric charges of which balance out to give a suspension of the precursors in the liquid. The suspension is heated to a temperature of 25 to 380° C. and the ionic liquid and the inorganic oxide of formula (I) are separated from the reaction of the precursors.Type: GrantFiled: October 23, 2009Date of Patent: March 7, 2017Assignees: Centre National De La Recherche Scientifique, Uníversite De Picardie Jules VerneInventors: Jean-Marie Tarascon, Nadir Recham, Michel Armand
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Patent number: 9293767Abstract: A material is made up of particles of an optionally-doped fluorosulphate. The fluorosulphate has a distorted Tavorite type structure of formula (A1?aA?a)x(Z1?bZ?b)z(SO4)sFf (I) where A=Li or Na, A? 0 a hole or at least one doping element, Z=at least one element selected from Fe, Co and Ni, Z?=a hole or at least one doping element, the indices a, b, x, z, s, and f are selected to assure the electroneutrality of the compound and a?0, b?0, x?0, z>0, s>0, f>0, the respective quantities a and b of dopant A and Z? being such that the Tavorite type structure is preserved. The material is obtained from the precursors thereof by an ionothermal route or ceramic route in a closed reactor. The material is of particular use as an active electrode material.Type: GrantFiled: October 23, 2009Date of Patent: March 22, 2016Assignees: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, UNIVERSITE DE PICARDIE JULES VERNEInventors: Jean-Marie Tarascon, Nadir Recham, Michel Armand
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Patent number: 9216912Abstract: The invention relates to a method for preparing an alkali metal and transition metal fluorosulfate that is useful as an electrode material in an electrochemical battery that operates by alkali ion exchange. The method includes a first step that involves: preparing a mixture of precursors of elements making up fluorosulfate, placing said mixture in contact with a solid polymer at ambient temperature, subjecting the reaction medium to a heat treatment that aims to melt the polymer, and subsequently reacting the precursors with one another. Said polymer is one that is solid at ambient temperature, has a melting point lower than the reaction temperature of the precursors, is stable at least up to the reaction temperature of the precursors, and is soluble in a nonpolar aprotic organic solvent.Type: GrantFiled: May 11, 2011Date of Patent: December 22, 2015Assignee: Centre National de la Recherche ScientifqueInventors: Jean-Marie Tarascon, Mohamed Ati, Michel Armand, Nadir Recham
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Publication number: 20140291572Abstract: The invention relates to a method for preparing an alkali metal and transition metal fluorosulfate that is useful as an electrode material in an electrochemical battery that operates by alkali ion exchange. The method includes a first step that involves: preparing a mixture of precursors of elements making up fluorosulfate, placing said mixture in contact with a solid polymer at ambient temperature, subjecting the reaction medium to a heat treatment that aims to melt the polymer, and subsequently reacting the precursors with one another. Said polymer is one that is solid at ambient temperature, has a melting point lower than the reaction temperature of the precursors, is stable at least up to the reaction temperature of the precursors, and is soluble in a nonpolar aprotic organic solvent.Type: ApplicationFiled: May 11, 2011Publication date: October 2, 2014Applicant: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUEInventors: Jean-Marie Tarascon, Mohamed Ati, Michel Armand, Nadir Recham
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Patent number: 8563761Abstract: The present invention relates to boron and aluminum complexes, to the preparation thereof, and to the use thereof for solubilizing ionic compounds. The complexes have one of the following formulae: in which D represents B or Al; R1 represents R, RF, NO2, CN, C(?O)OR, RSO2, or RFSO2; —X1—, —X2—, —X3— and X4 each represent a divalent group >C?O, >C?NC?N, >C?C(C?N)2, >CR2R3 or >SO2; —Y1—, —Y2— and —Y3— each represent a divalent group —O—, >N(C?N), >N(CORF), >N(SO2R4), >NR4, >N(COR4) or >N(SO2RF); R, R2 and R3 each represent H, an alkyl group, an aryl group, an alkylaryl group, an arylalkyl group, an oxaalkyl group or an alkenyl group; R4 represents an alkyl group, an aryl group, an alkylaryl group, a heteroaryl group, an arylalkyl group, an oxaalkyl group, an alkenyl group or an RFCH2— group; RF is a perfluoroalkyl group, a partially fluorinated alkyl group, or a partially or totally fluorinated phenyl group; each of the R?2 and R?3 groups represents R or F.Type: GrantFiled: March 19, 2009Date of Patent: October 22, 2013Assignees: Centre National de la Recherche, Universite de Picardie Jules VerneInventors: Michel Armand, Jean-Marie Tarascon, Nadir Recham, Sylvie Grugeon, Stephane Laruelle, Shanmukaraj Devaraj
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Publication number: 20120129050Abstract: A material is made up of particles of an optionally-doped fluorosulphate. The fluorosulphate has a distorted Tavorite type structure of formula (A1?aA?a)x(Z1?bZ?b)z(SO4)sFf (I) where A=Li or Na, A? 0 a hole or at least one doping element, Z=at least one element selected from Fe, Co and Ni, Z?=a hole or at least one doping element, the indices a, b, x, z, s, and f are selected to assure the electroneutrality of the compound and a?0, b?0, x?0, z>0, s>0, f>0, the respective quantities a and b of dopant A and Z? being such that the Tavorite type structure is preserved. The material is obtained from the precursors thereof by an ionothermal route or ceramic route in a closed reactor. The material is of particular use as an active electrode material.Type: ApplicationFiled: October 23, 2009Publication date: May 24, 2012Inventors: Jean-Marie Tarascon, Nadir Recham, Michel Armand
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Publication number: 20120007020Abstract: Compounds (I) AaMm(YO4)yZz (I) are provided where A is at least one element selected from the alkaline metals, alkaline earth metals, a doping element and a hole, M being (T1-1TV), T being one or more transition metals and T? being at least on element selected from Mg, Ca, Al, and the rare earths, 0?t<1; Y is a least one element selected from S, Se, P, As, Si, or Ge and A1; Z is at least one element selected from F, O or OH; a, m, y, and z are whole numbers of zero or above such that the electric neutrality of the inorganic oxide of formula (I) is respected, a?O; m>O; y>0; z?O. The compounds (I) are obtained from precursors of the constituent elements by means of a method comprising the following steps: dispersion of said precursors in a liquid support comprising one or more ionic liquids made up of a cation and an anion the electric charges of which balance out to give a suspension of said precursors in said liquid, heating said suspension to a temperature of 25 to 380° C.Type: ApplicationFiled: October 23, 2009Publication date: January 12, 2012Applicants: UNIVERSITE DE PICARDIE JULES VERNE, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUEInventors: Jean-Marie Tarascon, Nadir Recham, Michel Armand
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Publication number: 20110171112Abstract: The present invention relates to boron and aluminum complexes, to the preparation thereof, and to the use thereof for solubilizing ionic compounds. The complexes have one of the following formulae: in which D represents B or Al; R1 represents R, RF, NO2, CN, C(?O)OR, RSO2, or RFSO2; —X1—, —X2—, —X3— and X4 each represent a divalent group >C?O, >C?NC?N, >C?C(C?N)2, >CR2R3 or >SO2; —Y1—, —Y2— and —Y3— each represent a divalent group —O—, >N(C?N), >N(CORF), >N(SO2R4), >NR4, >N(COR4) or >N(SO2RF); R, R2 and R3 each represent H, an alkyl group, an aryl group, an alkylaryl group, an arylalkyl group, an oxaalkyl group or an alkenyl group; R4 represents an alkyl group, an aryl group, an alkylaryl group, a heteroaryl group, an arylalkyl group, an oxaalkyl group, an alkenyl group or an RFCH2— group; RF is a perfluoroalkyl group, a partially fluorinated alkyl group, or a partially or totally fluorinated phenyl group; each of the R?2 and R?3 groups represents R or F.Type: ApplicationFiled: March 19, 2009Publication date: July 14, 2011Inventors: Michel Armand, Jean-Marie Tarascon, Nadir Recham, Sylvie Grugeon, Stephane Laruelle, Shanmukaraj Devaraj